[LBNL-THERM] Underlay not converting to selectable polygons

[Jose Sosa Rueda]

Hi All. 

I am working on THERM 7.8, and Autocad version 2023. First THERM model for me, so figuring out how this works more efficiently. Any help is welcomed!

I drew a simple installation detail with a window and door frame in CAD; cleaned all layers and exploded all poly-lines and groups before exporting to DXF. 

When importing THERM as underlay, I check the box for "AutoConvert" to get the poligon selectable and just apply properties... is this possible? See image below, and DWG file attached. 

Thanks again!

Jose Sosa

Architect, CPHC

[Zugur Rakhmanov]

Hi!
Before the importing any sections it's necessary next preparation:
- all the polygons must be drawn closed;
- curved elements or parts of them are not allowed (I can share you the a special LISP which converts curved objects to polyhedral polylines);
- polygons edges must have length longer than 0.1mm;
- the files for importing must be saved in .dxf R12/LT2 format.

Best regards,

Zugur

ср, 21 июн. 2023 г., 13:37 Jose Sosa Rueda <jose.so...@gmail.com>:

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[Kawser H.]

Hi Zugar,

Would you be able to share the LISP that helps convert arcs to polylines? I 've been trying to convert the arcs, but it doesn’t work correctly when importing into THERM.

Thank you. 

[Zugur Rakhmanov]

Hi Kawser,

You can download that below.

Kind regards, 

 Zugur

To view this discussion visit https://groups.google.com/d/msgid/LBNL-THERM/a153dce7-b364-4306-b971-0d931673d218n%40googlegroups.com.

[Discern Decor]

Thank you so much. Regards, Kawser

[A]

how can I run the lps file?

[Darryl Branton]

Put the file somewhere specific, type appload into autocad command bar, in the popup window select the file you want to run, click load.

 

 

You will have to do this every time you open autocad unless you add the lisp to your contents as well.  To do this click contents while the window is open.

 

 

In the subsequent window click add

 

 

Browse to your lisp and select open.

 

 

Then just close the windows.

 

If you are asking about the “convert for therm.lsp” specifically, you can now run the program by typing “conv2therm” in the task bar.

 

After that just follow the command prompts.

 

Darryl Branton | Director of Operations Office: (519) 254-2838 ext. 227 Cell: (647) 362-1280 Address: 2040 Fasan Drive, Oldcastle Ontario, N0R 1L0 www.riversideglass.ca

 

 

From: lbnl-...@googlegroups.com <lbnl-...@googlegroups.com> On Behalf Of A
Sent: July 12, 2026 5:39 PM
To: THERM <lbnl-...@googlegroups.com>
Subject: Re: [LBNL-THERM] Underlay not converting to selectable polygons

 

how can I run the lps file?

El miércoles, 15 de octubre de 2025 a las 16:51:50 UTC+1, myecomme...@gmail.com escribió:

Thank you so much. Regards, Kawser

 

On Tue, Oct 14, 2025 at 1:49 PM Zugur Rakhmanov <zugur.r...@gmail.com> wrote:

Hi Kawser,

 

You can download that below.

 

Kind regards, 

 Zugur

 

On Tue, Oct 14, 2025 at 11:13 PM Kawser H. <myecomme...@gmail.com> wrote:

Hi Zugar,

Would you be able to share the LISP that helps convert arcs to polylines? I 've been trying to convert the arcs, but it doesn’t work correctly when importing into THERM.

 

Thank you. 

On Wednesday, June 21, 2023 at 4:23:21 AM UTC-7 zugur.r...@gmail.com wrote:

Hi!
Before the importing any sections it's necessary next preparation:
- all the polygons must be drawn closed;
- curved elements or parts of them are not allowed (I can share you the a special LISP which converts curved objects to polyhedral polylines);
- polygons edges must have length longer than 0.1mm;
- the files for importing must be saved in .dxf R12/LT2 format.

 

 

Best regards,

Zugur

 

 

ср, 21 июн. 2023 г., 13:37 Jose Sosa Rueda <jose.so...@gmail.com>:

Hi All. 

 

I am working on THERM 7.8, and Autocad version 2023. First THERM model for me, so figuring out how this works more efficiently. Any help is welcomed!

 

I drew a simple installation detail with a window and door frame in CAD; cleaned all layers and exploded all poly-lines and groups before exporting to DXF. 

 

When importing THERM as underlay, I check the box for "AutoConvert" to get the poligon selectable and just apply properties... is this possible? See image below, and DWG file attached. 

 

Thanks again!

Jose Sosa

Architect, CPHC

 

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